REPAIR STANDARDS - TM-9-2520-270-340073

TM 9-2520-270-34

n. SPRINGS. Discard defective springs. Length inspection data, where needed, is given in

maintenance procedures.

o. SHAFTS AND SPINDLES

(1) Replace defective parts.

WARNING

Compressed air can injure

you and others. Do not aim air

at soldiers. Do not use more

pressure than 30 psi (207 kPa).

Always wear goggles.

(2) Remove burrs and minor surface irregularities with a crocus cloth (Item 2, App B) or soft

honing stone. Remove obstructions with compressed air or by probing with soft wire,

p. BALL VALVES. Replace parts in which ball seats are damaged.

REPAIR STANDARDS

Repair standards are included in the tasks where needed. The minimum and key clearances for new

and repaired parts are included. Limits which indicate when a part should be replaced are included.

These clearances and limits will allow maximum service with minimum replacement. Normally,

parts not worn beyond the dimensions given in the task step will be approved for service.

FAULT ISOLATION

G E N E R A L . Procedures for locating and repairing transmission faults will be the

same for most failures. General procedures are explained below. Detailed

information is provided in the individual inspection trees.

b. FAULT SYMPTOMS. Read DA Form 2407 which comes with the failed transmission before

b e g i n n i n g any fault isolation. The fault symptom(s) recorded on DA Form 2407 provides

an entry to the correct inspection tree.

F A U L T S Y M P T O M I N D E X . Start any fault isolation procedure by looking up the fault

symptom in the fault symptom index. This is the only way to determine which inspection

tree or task to use.

d. I N S P E C T I O N T R E E S . U s e t h e i n s p e c t i o n t r e e f o r p e r f o r m i n g f a u l t I t i s o l a t i o n

procedures. Never skip blocks in the inspection trees. They may contain important

i n s p e c t i o n s or procedures. N e v e r assume that there is just one failed component or

assembly. Make sure you complete the tree.

T A S K S . Perform all tasks directed b y t h e i n s p e c t i o n t r e e . T h e y c o n t a i n i m p o r t a n t

c h e c k s , inspections, and cleaning p r o c e d u r e s . They also contain detailed steps to

repair failed assemblies.

2-11